-
-
Notifications
You must be signed in to change notification settings - Fork 31.6k
/
tests.py
176 lines (148 loc) · 6.53 KB
/
tests.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
from __future__ import with_statement, absolute_import
from operator import attrgetter
from django.contrib.contenttypes.models import ContentType
from django.contrib.sessions.backends.db import SessionStore
from django.db.models import Count
from django.db.models.loading import cache
from django.test import TestCase
from .models import (ResolveThis, Item, RelatedItem, Child, Leaf, Proxy,
SimpleItem, Feature)
class DeferRegressionTest(TestCase):
def test_basic(self):
# Deferred fields should really be deferred and not accidentally use
# the field's default value just because they aren't passed to __init__
Item.objects.create(name="first", value=42)
obj = Item.objects.only("name", "other_value").get(name="first")
# Accessing "name" doesn't trigger a new database query. Accessing
# "value" or "text" should.
with self.assertNumQueries(0):
self.assertEqual(obj.name, "first")
self.assertEqual(obj.other_value, 0)
with self.assertNumQueries(1):
self.assertEqual(obj.value, 42)
with self.assertNumQueries(1):
self.assertEqual(obj.text, "xyzzy")
with self.assertNumQueries(0):
self.assertEqual(obj.text, "xyzzy")
# Regression test for #10695. Make sure different instances don't
# inadvertently share data in the deferred descriptor objects.
i = Item.objects.create(name="no I'm first", value=37)
items = Item.objects.only("value").order_by("-value")
self.assertEqual(items[0].name, "first")
self.assertEqual(items[1].name, "no I'm first")
RelatedItem.objects.create(item=i)
r = RelatedItem.objects.defer("item").get()
self.assertEqual(r.item_id, i.id)
self.assertEqual(r.item, i)
# Some further checks for select_related() and inherited model
# behavior (regression for #10710).
c1 = Child.objects.create(name="c1", value=42)
c2 = Child.objects.create(name="c2", value=37)
Leaf.objects.create(name="l1", child=c1, second_child=c2)
obj = Leaf.objects.only("name", "child").select_related()[0]
self.assertEqual(obj.child.name, "c1")
self.assertQuerysetEqual(
Leaf.objects.select_related().only("child__name", "second_child__name"), [
"l1",
],
attrgetter("name")
)
# Models instances with deferred fields should still return the same
# content types as their non-deferred versions (bug #10738).
ctype = ContentType.objects.get_for_model
c1 = ctype(Item.objects.all()[0])
c2 = ctype(Item.objects.defer("name")[0])
c3 = ctype(Item.objects.only("name")[0])
self.assertTrue(c1 is c2 is c3)
# Regression for #10733 - only() can be used on a model with two
# foreign keys.
results = Leaf.objects.only("name", "child", "second_child").select_related()
self.assertEqual(results[0].child.name, "c1")
self.assertEqual(results[0].second_child.name, "c2")
results = Leaf.objects.only("name", "child", "second_child", "child__name", "second_child__name").select_related()
self.assertEqual(results[0].child.name, "c1")
self.assertEqual(results[0].second_child.name, "c2")
# Test for #12163 - Pickling error saving session with unsaved model
# instances.
SESSION_KEY = '2b1189a188b44ad18c35e1baac6ceead'
item = Item()
item._deferred = False
s = SessionStore(SESSION_KEY)
s.clear()
s["item"] = item
s.save()
s = SessionStore(SESSION_KEY)
s.modified = True
s.save()
i2 = s["item"]
self.assertFalse(i2._deferred)
# Regression for #11936 - loading.get_models should not return deferred
# models by default.
klasses = sorted(
cache.get_models(cache.get_app("defer_regress")),
key=lambda klass: klass.__name__
)
self.assertEqual(
klasses, [
Child,
Feature,
Item,
Leaf,
Proxy,
RelatedItem,
ResolveThis,
SimpleItem,
]
)
klasses = sorted(
map(
attrgetter("__name__"),
cache.get_models(
cache.get_app("defer_regress"), include_deferred=True
),
)
)
self.assertEqual(
klasses, [
"Child",
"Child_Deferred_value",
"Feature",
"Item",
"Item_Deferred_name",
"Item_Deferred_name_other_value_text",
"Item_Deferred_name_other_value_value",
"Item_Deferred_other_value_text_value",
"Item_Deferred_text_value",
"Leaf",
"Leaf_Deferred_child_id_second_child_id_value",
"Leaf_Deferred_name_value",
"Leaf_Deferred_second_child_value",
"Leaf_Deferred_value",
"Proxy",
"RelatedItem",
"RelatedItem_Deferred_",
"RelatedItem_Deferred_item_id",
"ResolveThis",
"SimpleItem",
]
)
# Regression for #16409 - make sure defer() and only() work with annotate()
self.assertIsInstance(list(SimpleItem.objects.annotate(Count('feature')).defer('name')), list)
self.assertIsInstance(list(SimpleItem.objects.annotate(Count('feature')).only('name')), list)
def test_only_and_defer_usage_on_proxy_models(self):
# Regression for #15790 - only() broken for proxy models
proxy = Proxy.objects.create(name="proxy", value=42)
msg = 'QuerySet.only() return bogus results with proxy models'
dp = Proxy.objects.only('other_value').get(pk=proxy.pk)
self.assertEqual(dp.name, proxy.name, msg=msg)
self.assertEqual(dp.value, proxy.value, msg=msg)
# also test things with .defer()
msg = 'QuerySet.defer() return bogus results with proxy models'
dp = Proxy.objects.defer('name', 'text', 'value').get(pk=proxy.pk)
self.assertEqual(dp.name, proxy.name, msg=msg)
self.assertEqual(dp.value, proxy.value, msg=msg)
def test_resolve_columns(self):
rt = ResolveThis.objects.create(num=5.0, name='Foobar')
qs = ResolveThis.objects.defer('num')
self.assertEqual(1, qs.count())
self.assertEqual('Foobar', qs[0].name)